Pipe-coupling.



NO. 800,890. PATENTBD SEPITA. 26, 1905 J'. o'MEARA.

PIPE coUPLING.

V Al 'mzoulon Hmm` An. 3.1904.

JNVE/v role Majma,

/1 fil/me y UNITED I sTATEs PATENT OFFICE.

JEREMIAH OiMEARA, OF NEW YORK, N. Y.

PlPE-OOUPLING.

Specification of Letters Patent.

Patented sept. 26, 1905.

Application'filed April 8, 1904. Serial No. 202,234.

a of which the followingis a full, clear, and ex- I one form of washer.

act description. I

The object of this invention is to provide an efficient fluid -tightunion or coupling for pipes which are subjected to expansion andcontraction through the influence of service.

The invention consists, essentially, of a washer of relatively softmetal, such as brass, of angular or other cross-section, which willpresent contact edges adapted to be fixed loosely to one member of thecoupling, so as not to become detached in handling, and therefore alwaysin position' for use and capable of being compressed between the ends ofthe pipes as they are drawn together xby the coupling-nut or otherdevice, so as to make a fluidtight joint, which is u'nalfected by theexpansion and contraction incident to use.

The invention is specially useful in the distribution of high-pressuresteam, oil, acids, and other fluids apt to cause expansion andcontraction of the pipes, thereby resulting in leakage.

The invention is susceptible of embodiment in various forms; but onlytwo variations are herein particularly described.

In the accompanying drawings, illustrating the invention, in the severalfiguresI of which like parts 1are similarly designated, Figure 1 is aperspective view of portion of a pipe coupling or union, showing thewasher in position. Fig. 2 shows in elevation ready for assembling theseveral parts of a pipe coupling or' union containing the washer of thisinvention. Fig. 3 is a longitudinal section ofv the coupling assembled.Fig. 4'is a cross-section of Fig. 5 is a cross-section of another formof washer.

The washer 1, Figs. l to 4:, is an annulus of dovetail or othercross-section, angular or otherwise, so as to present contact edges 2 ofless area than the width of the washer and capable of compressionbetween adjacent pipes or coupling members, so as to provide for renewedtightening up of the joint before the full width of the washer isincluded in the compression. This annulus has an integral tubularextension 3, which may be spun or expanded in the pipe or couplingmember, so as to attach the washer so fixedly to it as to retain itagainst accidental loss or detachment in handling and also so as to haveit always in position and ready for use. a

In Fig. 5 the annulus 4 and its tubular extension 5 are made as separateparts, and the' two are connected by a flange 6 on the extension 5;otherwise this form of washer is the same in function and application asthe washerfirst described.

Illustrating one form of couplingv comprising the washer of thisinvention the coupling member 7 is internally screw-threaded torece'ivea pipe and has an external flange8 and a. slight shoulder 9adjacent said flange. The

washer is secured loosely or movably in member 7 'by splnnlng orexpanding its tubular member against the shoulder, as shown in` VF1g. 3.The complemental coupling member IQ has an internal screw-thread toengage a plpe and an externally-screw-threaded flange 11. The nut oruniting member 12 is flanged p at 13 to engage the flange of bthe member7 and is screw-threaded to engage the screwthreaded flange 11 of themember lO, so that by screwlng up said nut the coupling members may bedrawn toward each other with the washer between them. In the case ofiron p1pes or pipes of 'a material relatively harder than the washer thewasher will be compressed between them, and thus it becomes, in effect,a packlng, so that a fluid-tigh-t joint is effected and one which isresponsive to contraction and expansion without impairing the tightnessof the joint; and, moreover, in case of leakage the joint may betightened up by further turning of the nut within'the limit ofcompressibility of the washer. A further advantage of the invention isthat when the washer is made of brass or similar metal not readilyoxidizable it constitutes an efiicient V are drawn together to make thejoint fluid- IOC) V tight, said Washer also having a tubular eX- tensionpermanently expanded Within one of the pipes and thereby movably butfiXedly secured to said pipe so as to resist accidental detachment inhandling the pipe.

2. A pipe-coupling member, comprising a washer of soft metal havingcontact edges of less Width than the area of the adjacent surfaces ofthe parts to be joined and capable of being compressed between saidparts as they are draWn together to make the joint fluidtight, and aseparately-formed tubular extension connected to said Washer andpermanently expanded Within one of the pipes and thereby movably butfixedly secured to said pipe so as to resist accidental detachment inhandling the pipe.

3. A pipe-eoupling, comprising an externally-flanged andinternally-shouldered member, an end washer of dovctail cross-sectionhaving a tubular extension permanently ex- I pauded within and againstthe shoulder of said member and thereby inovably secured thereto againstaccidental displacement in handling, an externally-screw-threadedmeniber and a fianged nut engaging the two members to draw them togetherand comprcss the washer between the fiange of theflanged member and theend of the screw-threaded meniber.

In testimony Whereof I have hercunto set my hand this 6th day of April,-A. D. 1904.

J EREMI AH OHHEARA. VVitnesses:

M; F. CLARK, M. T. CLARK.

